Art of making circumferential grooves



H; J. SCHMICK.

ART OF MAKING CIRCUMFERENTIAL GROOVES- APPLICATION ILEDA'PR. 16. 1920.'

1 43mm, Patented NW; 7, 1922.

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Be it kmwii'that I, J. SWEEP/HEEL) a citizen iii-a United St is, find a msidam of V'V iIHiainspmt n in ma County of Lycoming and Stake -01? P811115 Vania have inventai an Imprnvament Jane A t of Making Circumferential @9200 was 9:5 "which the following fiesci'ipiion i cm mciion with the accompanying is spaci ficatian like characia-ars on reprsseming like This invantis reim'es gears having iz esti- SJ'ZELILQ are used in warm, screw and ii-eliicai ing; but aha invention is Eesibric'bei 1'50 such gears, as is apphca i "w ail KHIGS periph'smi of ire-hairy 'maembers haviig groovss 03 math The invention compri 'es and apparmus f0? carry not limited to pm'tis pamius. What we inv'a; may be ascerioziinmi Emmi" scripizisn and In order $1121 iiiveiiu undars'saoci, ii; d

a yef risenl errad 1301mm 1n the accpmzoa @2161 in tha imed with his Will be 9V1 be adapted the purpose Lion. y

In the drawings, 1 'sicie eism tion of a machina for sutng Warm m3 geai ing according 3&0 the in 7'- Fig, 52; is 8, park; plan View w zonfml sectimi 0f the same: on in 1; 30035111 down 5mm im" a 61156; gszi-i' in the mac'hiis;

13 a hprimnmi section of the cutter and 03E driving 100i suiting a double *hhmm Fig; is sama parts in: WGEHJ and is Li similar View shs'wiii parts cutting EL non sylinarical with a coniimwus gimme.

Rsifsrring i0 R 3. and apparatus thaiieiii shown cam-55mins in animal ring 11 z orm;

-iiar allowing slitting a 'iTl'piG thmmm tiveiy.

11195 4.. William? armincl the inner perin" sry 0 near one Q the app saries each at. carve, Che spaces wri'v'ahiiinn iiform is ba'iswaeii simcessive Ems the me 5 mmrwa "which i is dashed (3112i mu 16 3110. may 'iiiiifiorm 0 I my vary according 130 5118 3011130039 "Wi'llGh it ii to be u The wmrk blank 15 has rials ahrouglq it concentric 17mm axis, 12; secured 11pm an M709" 1 y means 0;? a damping nut 19 Wiie J5me the a? pimss 21 die 2211 1 5 spinal formed simunfl its eriphery, fac piaiess we roiairad the same direction by means on the paws? Shfiffi? The baiiswCi-z 15111011 2 is the paw-e35? shaii; and the machinefm Whicn 5 7 bolts 2? passing through slats i3 secured mezmthe iirbm 18 I my 0 ifimGVEfi the machime in am gs v Tim rstzitinn n 1e al bi)? 18 upon its cenicsi's eommilad. =7 a, gear 29 fimac'i 11pm thc-a WJbDI and meshing with a m hing 30 fixed 115 11%;)? @1161 9.. tbs Emmi stock 111's The nut-er and of the spindle has gear 31 a" upon 1 5 which 111 meshes with ,2, 191211011 upon tm Bower Liesiihe vaisci'isy between me gears whim 0.761% was car rin

a I For cutting a double groove "no cutter 33 has two series of cutt teeth; and the driving gears 32 upon the power shaft and spindle i-e c ely are replaced by gears having a vei y ratiosuch that the arbor carrying '1 Work Se is caused to otate once und its owriaxis in the opposite direct to lace plates for each If-EVOF around the cutter ring (see or cutting three coves the cutter 85 has velocthree series or" cutti ears should ratio between a be such that the ar g the Work blank 36 l be T Wice around its own axis in t ection to or e the face plates olution around the cutter i as shovvn in ner periphery shapes. shape ofthe work So series cuttingteeth 2 the conformation c may be either continu To form a groove '5; upon the arbor 18 an r is mounted between centers to".

path to v desired, and or no; as desired.

is clamped til/.8 1e cross slide is Withdrawn to permit the blank to rotate inside of the c tter and as the machine is started the cross sli e is fed to carry the cutting teeth into the WOIl. The tech should be led in for their "uli denth in the first quarter revolution the plates and arbor. fine and one-quarter revolutions of the face plates and arbor are suilicient to finish the groove all the Way around tne work blank but more revolutions will make a smoother finish upon sides and bottom or" the groove.

The same procedure is followed for maktvvo grooves and three grooves only the cutter ring and spindle ears being changed as heretofore descri ed.

is evident that grooved products can be produced by the invention which are of various forms, some of which closely resemble general appearance the. ordinary helical or screw-gears or Worr s: that the invention permits oducts beproduced, such as, f xam, solids or revolution having circ rential grooves of varying angularity v resnect to their ears and or varying c sectional shape form or? which cannot be produced by ordinary screw and gear cutting or generating methods and apparatus.

l claim the following as my invention:

1. The art of making circumferential grooves by rotating a suitable blank upon its axis and revolving it to engage With a series of cutting teeth arranged around said blank in a spiral convolution having its axis eccentric to the axis of said blank, whereby said teeth out a circumferential groove around said blank, While maintaining a fixed relative rotative movement between said and convolution whereby said circumferential groove is of constantly changing position lengthwise oi the axis of the blank.

art of making gears and the like by rotating a blank upon its axis and revolving a circular orbit about a fixed axis to engage With a series of cutting teeth about said fixed axis in a convolution aving such radius as to intercept the pechery of said blank at each point in its orbit positioning successive teeth to engage blank laterally spaced points and maintaining a fixed relative rotation beiween said blank cutting teeth as the lank revolves in its orbit, whereby successive teeth cut circumferential portions of the periphery of said blank to form a groove.

3. The art oi making gears and the like rotating a blank upon its axis and revolving it in a circular orbit about a fixed axis to engage With a series of cutting teeth arranged about said fixed axis in a convolution having its ends laterally displaced and having such radius as to intercept the peri uhery of said blank at each point in its orbit. and maintaining a fixed relative speed rotation of said blank With reference to its speed of revolution proportional to the number of teeth to be formed said blank.

The art of making gears and the like by rotating a blank upon its axis and revolving it in a circular orbit about a fixed axis to engage with rows of cutting teeth arranged about said fixed axis, each rovv having its ends laterally displaced and having such radius as to intercept the periphery of said blank at each point in its orbit, and maintaining a fixed relative rotation between said blank and cutting teeth in proportion to the number of rows of teeth as the blank revolves in its orbit, whereby successive portions of the periphery 01": said blank Will be cut circumierentially by successive teeth in said rows and the lateral displacement of the ends thereof will deter mine the axial displacement or" the ends of the grooves thereby formed upon the blank.

tive to and in proximity "with a series cutting teeth lying in a curved line surrounding and concentric with said orbit, and arranging that successive teeth engage said blank at points in its periphery axially displacedwith reference to each other, while maintaining synchronism between the speed of rotation of said blank and its relative orbital movement with respect to said series of teeth, whereby the successive teeth produce circumferential cuts that merge into a groove encircling said blank and conforming generally to the shape of the line fol lowed by said teeth.

6. Apparatus for forming circumferentiall-y grooved elements consisting of means for rotating a work arbor upon its axis and for simultaneously revolving it about a fixed center, a ring of cutting teeth arranged around said work arbor and concentric with said fixed center, successive cutting teeth being slightly displaced in an axial direction with reference to adjacent teeth, and means for maintaining a predetermined ratio between the speed of rotation of said arbor upon its axis and the speed of its motion of revolution about said fixed center, whereby said teeth out a groove around the work on said arbor that said teeth follow during successive revolutions.

7. Apparatus for forming circumferentially grooved elements consisting of means for rotating a work arbor upon its axis and for simultaneously revolving it about a fixed center, a ring of cutting teeth arranged around said work arbor and concentric with said fixed center, successive cutting teeth being slightly displaced in an axialdirection with reference to the adjacent teeth uniformly throughout said ring, and means for main.

.taining a predetermined velocity ratio between the rotation of said arbor upon its axis and its motion of revolution about said fixed center, whereby said teeth out a groove around the work on said arbor of uniform axial advancement for equal angles of rotation about its axis.

8. Apparatus for, forming circumferential grooves including a head stock, a tail stock, a pairof face plates mounted for rotation in said head and tail stocks, respectively, means for rotating said face plates in synchronism in the same direction, opposing centers in, said face plates eccentricallyplaced with reference to their axis of r0- tation, a work arbor mounted on said centers, a gear on said work arbor, a spindle in said head stock, a'gear dn said spindle, and change speed gearing for rotating said spindle in synchronism with said face plates, said change speed gearing being adjustable whereby said arbor may be held stationary or rotated at the same speed or at a different speed and in synchronism with said face plates, and a ring of cutting teeth concentric with the axis of said face plates and adjustable to engage and cut the periphery of work on said arbor.

9. Apparatus for forming circumferential grooves including a head stock, a tail stock, a pair of face plates mounted for rotation in said head and tail stocks, respectively, means for rotating said face plates in synchronism in the same direction, aligning centers in said face) plates eccentrically placed with reference to their axis of rotation, a work arbor mounted on said centers, a gear on said work arbor, a spindle in said head stock, a gear on said spindle in mesh with the gear on said arbor, and

change speed gearing for rotating said spindle in synchronism with said face plates, whereby the speedof rotation of said arbor may be controlled and maintained in synchronism with said face plates, and a rmg of cutting teeth concentric with the axis of said face plates, said ring being movable to bring said teeth. into cutting engagement with work on said arbor.

' In testimony whereof, I have signed my name to this specification.

HENRY J. scnm'cx. 

